Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas festas existem em corridas envolvendo Dawson Mathis?
 ###Tabelas: CREATE TABLE  (_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Incumbent VARCHAR, Party VARCHAR, First elected INT, Result VARCHAR, Candidates VARCHAR) CREATE TABLE national_team_matches (national_team_matches_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Location VARCHAR, Opponenent VARCHAR, Result VARCHAR, Match type VARCHAR) CREATE TABLE jersey_progress (jersey_progress_id AUTO_INCREMENT PRIMARY KEY, Stage (Winner) VARCHAR, General classification VARCHAR, Mountains classification VARCHAR, Points classification VARCHAR, Combination classification VARCHAR, Team Classification VARCHAR) CREATE TABLE assembly_plants (assembly_plants_id AUTO_INCREMENT PRIMARY KEY, Company VARCHAR, Parent company VARCHAR, Parent headquarters VARCHAR, Plant VARCHAR, Models produced VARCHAR, Production (latest figures) VARCHAR) CREATE TABLE michigan_89_beloit_0 (michigan_89_beloit_0_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Touchdowns INT, Extra points INT, Field goals INT, Points INT)  
SELECT COUNT Party FROM  WHERE Incumbent = Dawson Mathis